Improvement in saw-sharpeners



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HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH CA dilute-ll mes GEORGE PRICE,OF-PEORlA COUNTY; ILLINOIS.

Letters Patent No..94,028, dated August 24, 1869.

IMPROVEMENT IN SAW-SHARPENERS.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom yit may concern; A

Be it known that I, GEORGE PRICE, of the county I of Peoria, and Stateof Illinois, have invented a new and improved Machine for SharpeningSaws; and do hereby declare that the following is a full, clear, andexact description thereof, reference being had to the annexed drawings,making a part Iof this specification, in which like letters of referencerefer to like parts, and in which- .Figure 1 represents a perspectiveview.

Figure 2 is a vertical section through centre of machine, looking towardthe adjusting-apparatus and saw.

Figure V3 is a side elevation.

Figure 4 is a plan view, with file-device removed, to show feeder.

This 'machine is for ling the teeth of any straight saw, which it does,by the adjustment-.devices to a mathematical nicety.

lt consists ot' a frame, A A,B B, on the rear portion of which is set abed, K, which carries the device for filing the saw, which deviceconsists of a trough, O, with parallel sides, the back part of whichcarries a spur\vheel, Y, and hand-crank, Z, which former is engaged witha pinion on a balance-wheel on the outside ofthe trough.

The pinion carries a crank, XV, which is connected by a rod, u, with areciprocating frame,1, carryingy the tile q.

The arms :c ot' thc trough C project some distance in advance ot' thefront of the machine, and carry. the

slides in whichfthe file-frame lr moves, and is'immediately over theclamps which confine thesaw.

The file-frame 1' is mounted on alng bar, working in slots pendent frombeneath the arms x of the trough.

Adjustable clamps, m ci, at each end of the frame fr, carry the file qbetween them.

The forward clamp encloses a cylindrical head, q', in which thetriangular point of the iile is held, and by the setting of which thefile is held at any required angle. I

Set-screws, t t t t, mise or lower the file-frame, and give its forwardend the required pitch.

The inside of the arms x ot' the trough support a horizontal slide, h h,clasped bya guide, -i e', projecting from the top ofthe frame lr.

The clamps E lfhcnfining the saw d '(1, are 'at the point ot'thcmachine, lying, when not otherwise set, at right angles to a'udhorizontally under `the filingapparatus, being fastened to the uppersurface of slide D', which moves withina horizontal bed, D.

The latter, D, is supported by the head of the vertical shaft F, whichpasses through the circular bed-- plate H, just under the horizontal bedD.

l This circular bed-plate H is let into and is supported by the upperhorizontal brace of the frame B of machine. v

The shaft F, above mentioned, sustains the whole of the saw-adjustments,and is stepped on the end of a horizontal lever, a., which hasa pivot inthc vertical brace f, in the centre of machine.

Below this lever is another one, whose fulcrum is a holt .in a jawbolted to a cross-bar of the frame.

One end of the lever is united to the middle and under surface of theformer lever a, its remote end terminating in a treadle, G, and may bedepressed by the foot, or it may be 'made adjustable by means of ascrew-r0d, g, and hand-wheel, to raise or lower the Jsaw toa hairsbreadth. v

Just above the step of the shaft 11, the latter passes through acorresponding opening ina horizontal bar, L, designed to act as a guide,and to this bar L, at either end, are fastened the ends of a segmentalguide, y, whose centre is the shaft F. l

An arm, d, armed with a vertical blade at its further extremity, whichfits either of the slots cut in the 'interior edge of segmental guide,according to adjustment, isthe means of setting the shaft 4and itssaw-adjustment to the required angle for iiling.

Another horizontal arm, e, projecting from said shaf F, embraces andslides up and down ou vertical bar lr, which terminates in a shoulderunder a lever, i, hereinafter described, and below in aslot whichembraces' the interior edge of segmenty.

A slot is cut through the barb, at the partemb'raced by the arm e, intowhich a key, running in eyes on the surface of the bar e, slides.

A spring, h, keeps the shaft tight down on the lever' a.

The red lilies in fig. 4 show one of the positions of*v saw-bed D, andhowI it swings on the snpportingfshaft F. The dotted red lines in .theother diagrams show vertical movements of the shaft and its attachments.'lhe motion lof the feeding-attachment is derived from a vertical arm, bb, passing up through a semicurcular sl'ot in the circular bed-plate HH, and terminating, beneath the latter,'in the head a a.

A shoulder or a neck wit-hin the slot contines it to its place, allowingthe arm to move cirularly with the saw-bed, but not to rise withfeeding-attachment.

To the upper end of this arm 'b b, and beneath the feed-bar, is pivoteda lever, which is its flllcrnm. One end of the same is pivoted to theside of the saw-bed D; the other, and longer end, 'to the longer-arm ofa lever or cam, o, the segmental head of which presses against the underside of the horizontal feed-bar m, which terminates in a triangular end,p, which slides. the saw by pressing'on the teeth.

The remote end of feed-bar m turns on a raised pivot,

of the saw-clam from which a curved spring, ff, is carried to near thepointof'the feed-bar, to which place it is fixed.

A slot, in the centre of this har fm, retains (by means of a pin) theend of a short horizontal lever, l, which is' attached to the upperpoint of a quadrant-shaped lever, t', its fulcrnm being near the lowerside of the saw-bed D, and immediately beneath this point.

To the further point of this riever, which is near the end of saw-bed,is pivoted the end of another horizontal lever, t fi, the other end ofwhich is fastened to the vertical side of a block', g g, which sustainsthe pivot ofthe feed-bar m. y,

The operation of this machine is as follows:

The saw d d is first inserted between the clamps E E, on the movablebed-boardD, andthe two hooked gauges e e, which move on a rod fastenedto the side ps E A 4, gauge the saw to a horizontal position.

The height of the saw is now to be regulated for the depth of tile-cutin the teeth, by means of the adjustable block k 7c and thumb-screw onthe shaft F,

which prevents vthe rise of shaft beyond the top of block, by strikingof the latter against the under side of the beam above it.

'I he treadle-levcr G is now depressed, or it may be done by'a screw andwheel, (as `at g.) "lhis brings the saw up to the file, which isoperated by the crank z, the connecting-rod u operating the file andflame, in the guides 'on the arms x of the trough O. The Viile4 can beset at any angle required; but to file the alternate. teeth diagonally,an inclination is given tol'the saw-bed by adjusting the blade at theend of arm d of shaft F, in either of the slots in the semicircularguide y y. This arm forms a steady stay to the sawbed during the actionof file on the saw. (The red lines in fig. Lleshow one of its positionsthus adjusted.)

As each eut is made, tile shaft is lowered;l at the same time'thefeed-bar m, pressing against the sawteeth, carries the saw andbed-boardor slide one tooth tothe right or left, as required.

. When the alternate teeth of saw are cut at one angle, the saw-bed canbe swung round in the opposite position for the next cut7 the filemaking exact and'clear cuts, vand at equal distances, and thesame filelasts on this machine a long time, for the reason that there is notwisting motion given tothe ile,wl1ich, when used for saw-filing vbyhand, the teeth of file are soon broken off, and the file spoiled, andthen not making clean work.

The level or inclination of the ile is regulated by the' set-screws t tt acting on the guide h. h, fig. 3, by which thefront extremity only ofthe bar S is inclined, the lrear portion sliding in a close-fittingslot.

The operation of the feeding-portion needs, perhaps, extra description.

Thepressure on the treadle G is the .means of motion to feed-bar m'.Thus the pressure on the treadle throws up the saw-.bed D, raises theend of lever i,

Aand causes the curved spring f f to throw back the point p of thefeeder m horizontally. The saw-bed still rising, carries up the fixedeind of lever 11., whose centre part is pivoted to the arm l; l), whichprojects npward through the slot in the block g g, fixed in the circularbed-plate H, depresses the other end'of said lever n, and that of thelever 0, to which it is attached,

and causes tlie segmental' head of the :latter to press upward the pointof the 'feed-bar m, (ready for it, by

f its return, to inove the saw for the next cut.)

The le is no w set to work by means of the crank z, and whenl tiling isdone for that time, the treadle is released. The spring h forcing theshaft F and saw-bed downward, a reverse action of the levers ensues,bringingv the point p of the feed-bar down onto the saw, againstv thevertical edge of saw-tooth, and the feedbar now makes its finalmovement, and carries the same one toothtoward-the' left of the operatorat the front of the machine.

The extent of thc horizontal movement of the feedbar m is regulated bythe thumb-screws c c c c, on the projecting heads on each sideof thesaid bar. The process is now repeated until the filing is done.

C' latins.

Having thus fiilly described my' invent-ion,

That I claim therein as new, and desire to secure by Letters Patent, isl. The vertical shaft F, having an arm, d, provided with a blade, incombination with the slots ofthe semicircular guide y y, and the movablesaw-bed D, substantially as and for the purpose set forth.

set-screw with the vertical shaft F, substantially as and for thepurpose described.

3. The treadle G, lever a, and vertical shaft F, withspring h, incombination with .the movable saw-bed D, substantially as described.

device m, for feeding the teeth of the saw to the tile q, substantiallyas described.

5. The Alevers fi, k, l, m, a, and o, spring ff, vertical bar b, andvertical arm b b, so constructed and operating as to give the requiredfeeding-movement to the feed-device or bar m, substantially asdescribed.

` .6. '.lhe arm e and vertical bar b, in combination with the shaftl F,semicircular guide y y, and lever i, substantially as described.-

7. The movablesaw-bed D, with slide D', and block g g, having thefeed-device or bar m pivotedto a post thereon, in combination with thecircular-.bed-plate H and shaft F, when constructed and operatingsubstantially as described.

8. The bed-plate K, trough 'wheel V, and pinion, balance-wheel, crank W,and arm '11, connecting with tile-frame, all constructed and arranged asherein described.

9. The combination of the set-screws t t t with the guide h h, sothatthe required pitch or inclination may be given to the forward end offile, substantially as described.

10. 'lhe adjustable file-clamps 'm m and bar S, working in pendent slotsfrom the arms x of thetrough C, inv combination with the arm u,constructed and operatingsnbstantially in the manner and for the purposeas set forth. i 11. lhe combination of the gauges e c e c, as, arrangedon the rod with the saw-clamps E E, substantially as described.

'In testimony that I claim the foregoing saw-sharpening machine, I havehereunto set myhand,.this 31st day of March, 1869.

GEORGE PRICE.

Witnesses EDMUND THUnLow,'f HENRY Wi lVuLLs.

2. The combination of the adjustable block lc It and 4. Providing themovable saw-bed D with a feed- C, with arms x, spur-

